PieFed.ziptimkenhan, timkenhan@sopuli.xyz
Instance: sopuli.xyz
Joined: 3 years ago
Posts: 15
Comments: 33
Posts and Comments by timkenhan, timkenhan@sopuli.xyz
liminalspace
linux
hardware
eternityapp
coffee
ece
gentoolinux
metaComments by timkenhan, timkenhan@sopuli.xyz
LinuxCoreboot by itself is just a hardware initialization code that basically tells your computer what to do when it turns on (i.e. get the processor running, turn on the RAM chips and get the capacity, then see what can be used for outputting display or serial console).
This is all executed before the user sees anything on the screen, at which point the handover to the payload firmware (i.e. the stuff you’d know as ‘the BIOS/UEFI screen’) is complete.
The coreboot project do also work with getting the BIOS/UEFI stuff running thru their initialization process as their payload, but the code for these payloads are completely separate projects.
Thanks for the explaination!
The other day I was checking out the datasheet for my Yaesu monobander’s final amp, and I noticed that it is able to performs optimally up to its advertised 80w only between 144mhz and 148mhz, while outside of that it’s capped to 60w. I’m pretty sure this is related to what you just explained.
Overall, I feel like the 2m band is like a kiddie playground, while the grownups are hanging out with their big antennas on HF.
What do you mean? Can you elaborate?
Perhaps it’s a regional thing. It is quite the wilde west where I’m from after all.
For the Yaesu FT-2900R, I indeed acquired this second hand, but I also got myself a new old stock FT-60R that seems to be able to transmit outside the HAM band for both 2m and 70cm out-of-box.
I have a few monobanders by Yaesu & Icom, and all of them are able to ony only Rx but also Tx outside of the HAM freqs. Of course, I’d be very careful with them 😇
Update: I accidentally shorted some component’s pins and the it failed to deliver the specified power once again. Guess now I know what happened to the old component I replaced. Luckily I have a spare.
Amateur Radio@lemmy.radio
Update: I decided to get myself a linear power supply. The issue persists. Therefore, it’s not power supply issue. The good news is, I now have no issue transmitting at full 75w power.
Is it underground? Is it inside a mall? Why not both?
Lol, I didn’t even realize there’s the gal in hijab
You’re very close! This is in Jakarta, Indonesia
Update: The correct part has arrived. After replacing it, no more voltage drop!
Update: After inspecting the components’ voltages across the circuit and cross-checking it with the service manual, I found one of the transistors, marked Q1008 in the diagram, might be out of spec. The component should’ve been 2SJ615. Who knows what the phony seller did to it, but it was outputing well below the specified 13.5-13.8V (yes, I made sure the input was correct).
The power supply is rated for 360 watt, but who knows, it is a cheap chinese product after all.
Open SourceThe link doesn’t seem to work.
picsIs that the Duomo?
AsklemmyI’m learning Italian, just passed A2, and am probably gonna continue with B1 if the course schedule is right.
At the moment, I am having a vacation in Italy, and I realized that there’s no more effective way than having use cases that you can relate on a personal level.
Sounds about right. It’s supposed to be some kind of USB button input. But it seems only the audio device part is working.
I tried to detect button input, but it doesn’t seem to go thru in any way. I’m currently using Linux Mint on that (LMDE 7 to be exact). Haven’t tried using other setup.
It doesn’t bother me that much tho. The laptop itself has some standalone volume buttons, so that helps.
WindowsMakes sense, especially with all the tech bros racing to enshittify the world.
My dad gave me a nice audio set including a pair of speakers, a Rotel power amp, and a Rotel amp that I use as a pre-amp.
This thing sounds wonderful. The problem was, I only got a Thinkpad to drive it. Now, Thinkpads may have shitty speakers, but they are by no means bad audio device. That HD audio still does the job well enough for most case.
But this is not most case. For my case, I wanted something more, without shedding the convenience of internet. Sadly, a desktop PC is not an option, due to some constraints.
So I got myself a USB soundblaster. This thing sounds phenomenal! And I only had to plug it in. My only complaint is that the volume knob does not work.
Coreboot by itself is just a hardware initialization code that basically tells your computer what to do when it turns on (i.e. get the processor running, turn on the RAM chips and get the capacity, then see what can be used for outputting display or serial console).
This is all executed before the user sees anything on the screen, at which point the handover to the payload firmware (i.e. the stuff you’d know as ‘the BIOS/UEFI screen’) is complete.
The coreboot project do also work with getting the BIOS/UEFI stuff running thru their initialization process as their payload, but the code for these payloads are completely separate projects.
Thanks for the explaination!
The other day I was checking out the datasheet for my Yaesu monobander’s final amp, and I noticed that it is able to performs optimally up to its advertised 80w only between 144mhz and 148mhz, while outside of that it’s capped to 60w. I’m pretty sure this is related to what you just explained.
Overall, I feel like the 2m band is like a kiddie playground, while the grownups are hanging out with their big antennas on HF.
What do you mean? Can you elaborate?
Perhaps it’s a regional thing. It is quite the wilde west where I’m from after all.
For the Yaesu FT-2900R, I indeed acquired this second hand, but I also got myself a new old stock FT-60R that seems to be able to transmit outside the HAM band for both 2m and 70cm out-of-box.
I have a few monobanders by Yaesu & Icom, and all of them are able to ony only Rx but also Tx outside of the HAM freqs. Of course, I’d be very careful with them 😇
The official HAM frequency designation for 2m band is between 144mhz and 148mhz. So why are transceivers, even the monobanders, able to work on a much wider range?
Usually between 136mhz and 174mhz, with only software-based restrictions that are easily worked around. This applies for other bands as well (e.g. 70cm).
Update: I accidentally shorted some component’s pins and the it failed to deliver the specified power once again. Guess now I know what happened to the old component I replaced. Luckily I have a spare.
Update: I decided to get myself a linear power supply. The issue persists. Therefore, it’s not power supply issue. The good news is, I now have no issue transmitting at full 75w power.
Is it underground? Is it inside a mall? Why not both?
Lol, I didn’t even realize there’s the gal in hijab
You’re very close! This is in Jakarta, Indonesia
A Desolate Underground Supermarket
That is exactly right.
Loud Static Noise
It’s me again, back with my Yaesu FT-2900R rig. I’ve worked thru most of the issues with it, but some remain.
Update: The correct part has arrived. After replacing it, no more voltage drop!
Update: After inspecting the components’ voltages across the circuit and cross-checking it with the service manual, I found one of the transistors, marked Q1008 in the diagram, might be out of spec. The component should’ve been 2SJ615. Who knows what the phony seller did to it, but it was outputing well below the specified 13.5-13.8V (yes, I made sure the input was correct).
The power supply is rated for 360 watt, but who knows, it is a cheap chinese product after all.
Yaesu FT-2900R Getting Lower Voltage Than Supplied
Hi everyone, is there a Yaesu rig user in the house?
The link doesn’t seem to work.
Is that the Duomo?